/* CirKit: A circuit toolkit
 * Copyright (C) 2009-2015  University of Bremen
 * Copyright (C) 2015-2017  EPFL
 *
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without
 * restriction, including without limitation the rights to use,
 * copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
 * conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "xmg_revenge.hpp"

#include <core/utils/timer.hpp>
#include <classical/xmg/xmg_rewrite.hpp>

namespace cirkit
{

/******************************************************************************
 * Types                                                                      *
 ******************************************************************************/

/******************************************************************************
 * Private functions                                                          *
 ******************************************************************************/

/******************************************************************************
 * Public functions                                                           *
 ******************************************************************************/

xmg_graph xmg_add_controlled_inversions( const xmg_graph& xmg, const properties::ptr& settings, const properties::ptr& statistics )
{
  /* timing */
  properties_timer t( statistics );

  const auto rewr_settings = std::make_shared<properties>();
  rewr_settings->set( "prefill", prefill_func_t( [xmg]( xmg_graph& xmg_new, std::map<xmg_node, xmg_function>& old_to_new ) {
        for ( const auto& input : xmg.inputs() )
        {
          const auto s = xmg_new.create_pi( input.second + "_select" );
          const auto x = old_to_new[input.first];
          const auto f = xmg_new.create_xor( s, x );

          old_to_new[input.first] = f;
        }
      } ) );

  return xmg_rewrite_top_down( xmg, rewrite_default_maj, rewrite_default_xor, rewr_settings );
}

}

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